Create profiles, use different email, name, pictures, bio and all.... Just keep enough variations... Leave profiles once you create them and post your links after 1 week... You will find some of your created profiles doesn't exist by that time but whatever has survived 1 week will have good chance of making though further... I don't think on mass scale it will be possible for you to coontribute any good in forum but if you can then you will have more success in keep them alive...